| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -12.1° | -21.7° | 23.1mm | 13.1 | 4 |
| February | -8° | -18.9° | 18.3mm | 10.5 | 9 |
| March | 0.4° | -10.7° | 20mm | 10.1 | 10 |
| April | 11.8° | -0.3° | 27.7mm | 8.9 | 53 |
| May | 20.5° | 6.4° | 37.7mm | 9.9 | 80 |
| June | 24.6° | 12.1° | 56.4mm | 11.3 | 77 |
| July | 26.2° | 14.1° | 72.1mm | 12.5 | 75 |
| August | 24.6° | 11.8° | 41.2mm | 10.9 | 78 |
| September | 18° | 5.7° | 31.6mm | 10.4 | 73 |
| October | 9.3° | -0.4° | 35.5mm | 11.6 | 39 |
| November | -2° | -9.5° | 42.5mm | 14.6 | 1 |
| December | -8.9° | -17.7° | 32mm | 16.1 | 0 |
January in Barnaul averages a daily high of -12.1°C with nights around -21.7°C. Expect roughly 13.1 wet days totalling 23.1mm. A hard month to visit for comfort alone.
February in Barnaul averages a daily high of -8°C with nights around -18.9°C. Expect roughly 10.5 wet days totalling 18.3mm. A hard month to visit for comfort alone.
March in Barnaul averages a daily high of 0.4°C with nights around -10.7°C. Expect roughly 10.1 wet days totalling 20mm. A hard month to visit for comfort alone.
April in Barnaul averages a daily high of 11.8°C with nights around -0.3°C. Expect roughly 8.9 wet days totalling 27.7mm. Demanding conditions — pack for it and plan indoor options.
May in Barnaul averages a daily high of 20.5°C with nights around 6.4°C. Expect roughly 9.9 wet days totalling 37.7mm. Comfortable conditions for being outdoors all day.
June in Barnaul averages a daily high of 24.6°C with nights around 12.1°C. Expect roughly 11.3 wet days totalling 56.4mm. Comfortable conditions for being outdoors all day.
July in Barnaul averages a daily high of 26.2°C with nights around 14.1°C. Expect roughly 12.5 wet days totalling 72.1mm. Comfortable conditions for being outdoors all day.
August in Barnaul averages a daily high of 24.6°C with nights around 11.8°C. Expect roughly 10.9 wet days totalling 41.2mm. Comfortable conditions for being outdoors all day.
September in Barnaul averages a daily high of 18°C with nights around 5.7°C. Expect roughly 10.4 wet days totalling 31.6mm. Generally workable, with some weather to plan around.
October in Barnaul averages a daily high of 9.3°C with nights around -0.4°C. Expect roughly 11.6 wet days totalling 35.5mm. Demanding conditions — pack for it and plan indoor options.
November in Barnaul averages a daily high of -2°C with nights around -9.5°C. Expect roughly 14.6 wet days totalling 42.5mm. A hard month to visit for comfort alone.
December in Barnaul averages a daily high of -8.9°C with nights around -17.7°C. Expect roughly 16.1 wet days totalling 32mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Barnaul peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Barnaul, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.2°C.
July is the wettest, averaging 72.1mm of rain across roughly 12.5 wet days.
January is the coolest month, with average daily highs around -12.1°C.